Help with actionscript to modify navfla please

Help with action script to modify navfla please.

I have attached the files. This script was originally a vertical navigation. I have attempted to convert to horizontal with some help but I like further help.

What I want to do is to display more then 3 scrolling navigation images with hyperlinks. (hyperlinks already working)

The other question is what should I change if my navigation images are larger size in dimensions.

And what should I change if I add additional images with hyperlinks to the existing navigation?

Thanks to you in advance.